The print is 8x10, the frame is 11x14, and the fair is Saturday.
Give it the art size and the outer frame size — it hands back your borders, the window opening at your overlap, optional bottom-weighting, and how many blanks a 32x40 sheet yields. Everything stays in your browser.
The piece
Your conventions
The image
The paper & ink
The numbers here are yours to check. This page does arithmetic on what you type — it cannot see your recipe, your equipment or your batch.
Want it to remember?
In MadeKeeper, matboard sheets are consumed at the real yield of every cut, so each framed piece carries its true mat cost into your ledger instead of a guess from memory. See for artists & framers or poke around the live demo. $19/mo for the whole back office, kept for as long as you stay. The shop stays free for cost a piece and one fair — no product cap. The tax packet, Etsy and Square, and more fairs are the $19.
Art & framing · Free calculator
None of this is complicated math — subtraction, division, and one nesting problem. What's worth knowing is which numbers are fixed arithmetic and which are conventions you get to set, because a couple of them are genuinely argued about at the bench.
How wide should the borders be for an 8x10 print in an 11x14 frame?
Subtract the art from the outer size and split what's left: (11 − 8) ÷ 2 gives you 1.5 inches on the left and right, and (14 − 10) ÷ 2 gives you 2 inches top and bottom. The borders come out unequal because an 11x14 isn't a scaled-up 8x10 — the leftover just splits differently on each axis, and that's normal, not a miscut. Type in any pair of sizes and the calculator does the same split.
Why is the window opening smaller than my art?
The mat has to overlap the edge of the art or the piece falls straight through, so the window is cut at the art size minus twice your overlap. A quarter inch per side is the common convention — and it's a number framers genuinely argue about, since some cut tighter, down toward an eighth, when a pencil signature or a full-bleed edge sits close to the border. That's exactly why the overlap is a setting here instead of a baked-in number. At the default quarter inch, an 8x10 opens to 7.5 x 9.5.
What is bottom-weighting, and why is it off by default?
It's an optional extra on the bottom border that some framers swear by — the argument being that a mathematically centered window reads to the eye as sitting a touch low. It's a taste call rather than a rule, so the calculator leaves it off until you turn it on. When you do, the window shifts up by whatever amount you choose — the bottom border grows by that much, the top border gives up the same, and the sides stay put.
How many blanks come out of a 32x40 sheet, and what does each one cost?
The calculator nests your blank size against the standard 32x40 sheet in both orientations and rounds down to whole pieces — 11x14 blanks come out at 6 to a sheet, two across the 32-inch side with the 14-inch edge leading and three down the 40. Cost per blank is just the sheet price divided by that yield: say the sheet ran you $24, that's $4 a blank. Treat it as the clean-math count, though — squaring the sheet, a shipped ding in one corner, or one bad pull can trim what you actually get, and your count off the bench is the one that matters.